A Fredholm-like Result for Strongly Nonlinear Second Order ODE's. (with
Garcia-Huidobro M. and Zanolin F.) Journal of Differential

Equations. 114 (1994) 132-167.

On a Pseudo Fucik Spectrum for Strongly Nonlinear Second Order ODE's and
an E xistence Result. (with Garcia-Huidobro M. and Zanolin F.) Journal
of Computational and Applied Mathematics 52 (1994) 219-239.

Global Bifurcation from the First Eigenvalue for a System of p-
Laplacians (with Fleckinger J. and de Thelin F.) Mathematische Nachrichten

182(1996), 217-242.

Some bifurcation results for a class of p-Laplacian like operators. (with
Garcia-Huidobro M. and Schmitt K.)
Differential and Integral Equations
10(1997), 51-66.

Infinitely many solutions for a Dirichlet problem with a non homogeneous
p-Laplacian like operator in a ball. (with Garcia-Huidobro M. and Zanolin
F) Advances in Differential Equations 2(1997), 203-230.